<% if siteThumbImage.image.nil? %>
    <%= link_to(image_tag('default_site_thumb.jpg', :alt => "#{siteThumbImage.title}", :class => 'picborder'), admin_site_path(siteThumbImage))%>
<% else %>
    <%= link_to(image_tag(url_for_file_column(siteThumbImage, "image", "thumb"), :alt => "#{siteThumbImage.title}", :class => 'picborder'), admin_site_path(siteThumbImage))%>
<% end %>